Subj : USR USB Modem woes
To   : Ted Long
From : deon
Date : Mon Jan 30 2023 08:26:58

  Re: USR USB Modem woes
  By: Ted Long to deon on Sun Jan 29 2023 11:35 am

 > Thanks for the response
 >
 >  Hotplug is detecting the modem....(cutcutpaste...)
 >
 > Bus 001 Device 006: ID 04c1:3021 U.S. Robotics (3Com) 56k Voice FaxModem Pro
 >
 >  And the kernel is assigning it to abstract (virtual) port /dev/ACM0....the
 > modem apparently is seeing activity on the port, because when I plug in the
 > USB cable, the data and CTS/RTS LEDs flash for a second. But there's no
 > response to an AT command when sent from Minicom. I'm about ready to break
 > out the 'scope or a logic probe to see if any data is actually being sent to
 > the modem.

OK, what device is the comms program using to talk to a "modem"?

If you use minicom, you should be able to connect to port /dev/ACM0 and talk to it - get the baud right because the modem will be talking a default baud rate - probably 19,200 or 38,400, and if they dont work 115k might. You'll know your close, because you'll see gibberish at the wrong baud speed.


....лоеп

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